1994 lexus ls400 battery drain overnight
Brand new battery and alternator and
recently just replace the relay horn. If
my car sits for about 13 hours my
battery is dead
I would remove the horn relay and see if you still have the problem. If not the it would indicate a draw of power from the horn circute or even the alarm.
Does the horn relay cause the door locks to make a small noise or make the power drain when pulling my seat back